Centrifuge



Filed April 10,'1947 Patented May 9, 1.95()

Gustav Allan Larsson, Stockholm, Sweden Application April 10, 1947, Serial No. 740,694 In Sweden November 26, 1945 1 claim. 1

My invention relates to a centrifugal machine for the sedimentation of particles suspended in liquids of the type comprising a rotatable member and cylindershaped containers for the suspensions to be centrifuged having their upper ends hingedly secured to said rotatable member and being independently settable in different angles of inclination relatively to the axis of rotation of said rotatable member in order to obtain different centrifugal effects on the sus pensions therein, and the main object of my invention is to provide improved setting means for the containers.

A centrifugal machine according to the invention is illustrated in the accompanying drawing, in which:

Fig. 1 is a vertical section of a centrifugal machine provided with the device in question, and

Fig. 2 is a section of one of the containers in which the stuff to be centrifuged is placed.

3 is a preferably conically shaped foot supporting a cupular container 4. Within the foot is a drive motor 5, the shaft 6 of which extends vertically upwards into the cup il. To the shaft 6 is secured a sleeve-shaped holder l, the lower portion of which is provided with a flange-shaped part 8. On said flange-shaped part 8 are fixed arcuate supporting members 9 by means of screws I0. The upper end portions of the members 9 are held together by means of a ring II. upper portion of the holder I is provided with members I2 directed radiallyV outwards between which centrifugal containers I3 are articulately mounted by means of pins I4. The centrifugal containers I3, which are four in the present case, consist of tubes of suitable metallic material and are provided with a bottom I5. One end portion of the respective container is provided with a flange I6 resting against an annular member I1. The pins I4 mentioned above with reference to Fig. 1 are arranged on the Aring I1 which is secured to the ange IB by means of a ring nut I8. The container I3 is adapted to be displaced in a sleeve-shaped member 2B provided with a bottom I9. Within the sleeve-shaped member 2li there is a spring 2l resting on the bottom I5 of the container I3. The bottom I9 of the sleeve 20 is provided with an axially directed cam 22 having a groove 23. The arcuate supports 9 are provided with a number of grooves 24 in which the inner edge portion of the groove 23 of the sleeve-shaped member 20 is caused to rest when the container I3 is being set in a certain angular position relatively to the shaft 6.

The spring 2I, which presses the sleeve 20 The ,L

against either of the arcuate supporting menibers 9, serves to retain the container I3 in the set angular position. When the containers I3 together with the sleeves 20 are to be moved from one of the grooves 24 to another groove in the supports 9, the sleeve 20 is moved inwards on the container until said sleeve is released from the respective support, whereafter the respective container can be displaced.

If different stuffs which are to be centrifuged with different centrifugal effect, are to be tested, this can be made at the same time with a centrifugal machine according to the invention.

The centrifugal containers are set in pairs in different angular positions so that the weight oecomes equal radially and diametrically relatively the drive shaft with regard to the balancing of the system.

The cupular container 4, in which the vital parts of the centrifugal machine are arranged, is closed by a cover 25.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

In a centrifugal machine comprising a rotatable member, and cylindershaped containers for the suspensions to be centrifuged having their upper ends hingedly secured to said rotatable member and being independently settable in different angles of inclination relatively to the axis of rotation of said rotatable member in order to obtain different centrifugal effects on the suspensions therein, the combination of arcuate supporting arms, one for each of said containers, secured to the lower end of said rotatable member and held together at their upwardly directed outer ends by a common annular connection, said supporting arms having on their inside transversal grooves uniformly spaced along the whole length of said arms, and sleeve-shaped setting means arranged at the lower, outer end of each of said cylindershaped containers and being in the interior provided with a helical spring resting against the bottom of the respective container mentioned and thus tending to press said setting means outwards, said setting means being at the outer end thereof provided with a transversal cam member displaceably resting against one of the arcuate supporting arms mentioned before and engaging either of said grooves thereon, said cam member having projections to prevent lateral displacement, all for the purpose of making the lower, outer ends 4of said containers capable of being displaceably set and retained at different distances from the axis of rotation of said rotatable member in order to achieve an inclination of said containers relatively to said Number axis of rotation. 566,257 GUSTAV ALLAN LARSSON. 925,105

5 9 ,57 REFERENCES CITED 13g?) 77g The following references are of record in the le of this patent: NiuyilierA 4 UNITED STATES PATENTS Name Date Weiper Aug. 18. 1896 Kaufman June 15, 1909 Maxey July 13, 1909 Lundgren Oct. 8, 1929 FOREIGN PATENTS Countify" Date Grt Britai June 15, 1909 

